INVESTIGATION OF DIFFERENT ELECTRODES IN ELECTROCOAGULATION OF DOMESTIC WASTEWATER TREATMENT

Electrocoagulation method with iron/iron, and Cu and Ti/IrO2 electrodes as cathode and anode were used, to treat the domestic wastewater in batch reactor. The performance of electrocoagulation (EC) process was investigated for phosphorous, chemical oxygen demand (COD) and NH4 + − N reduction. The effects of the relevant key operating conditions such as amperage and electrolysis time were studied in order to evaluate the performance of electrodes. The result indicates that electrocoagulation is very efficient and was able to achieve phosphorous removal (99.46%), COD removal (56.11%) and NH4 + − N (58.37%) at 0.8A in 60 min in the presence of iron electrode. The NH4 + −N removal by Cu and Ti/IrO2 electrodes were achieved at 99.82% at 0.8A in 45 min. The results revealed that the ammonium was removed and 2.33 mg/L of nitrate was found with the weak formation of nitrite. Finally the Ti/IrO2 electrode was not affected by the process. It means that total suspended solids were removed by Fe electrode